Stable aqueous solutions of hydroxy-ethylamino salts of 3-acetylamino-4-hydroxybenzenearsonic acid



Patented May 24, 1932 KARL STREITWOLF, F FRANKEORT-ON-THE-M'AIN, ALFRED FEHRLE, OF BAD SODEN- HERRMANN AND PAUL FRITZSCI-IE, OF FRANK- ASSIGNOBS TO WIN THRO]? CHEMICAL COMPANY, IN 0., OF NEW YORK, N. Y., A CORPORATION OF ON -THE-TAUNUS, AND VIALTER FORT-ON-TI-IE-MAIN, GERMANY,

NEW YORK STABLE AQUEOUS SOLUTIONS OF HYDROXY-ETHYLAMINO SALTS 0F 3-AGETYLAMINO- 4-HYDROXYBENZENEARSONIG ACID No Drawing. Original application filed January 4, 1930, Serial No. 418,648, and. in Germany June 14,

1929. Divided and this application filed February 6, 1931.

This application is a divisional application of our application for United States Letters llPgatgnt, Serial No. 418,648, filed January 4,

5 The parent application relates to new hydroXy-ethylamino salts of 3-acetylamino-4 hydroxybenzenearsonic acid.

The present application relates to a method of preparing stable aqueous solutions of the said hydroXy-ethylamino salts of 3-acetylamino-4-hydroxybenzenearsonic acid.

The stable solutions are preferably prepared in the following manner: To an aqueous solution of the said salts which dissolve already in 1.5-2 parts of their weight of water is furthermore added a small quantity of a stabilizing agent, as, for instance, sodium sulfite.

In a similar manner there may be used the solutions obtainable by combining hydroxyethylamine with 3-acetylaminol-hydroxybenzenearsonic acid prepared according to the example of the parent application, to which solution is added a small quantity of a stabilizing agent, as, for instance, sodium sulfite.

We claim:

1. An aqueous solution of a hydroxyethylamino salt of 3-acetylamino-A-hydroxybenzene arsonic acid of the following probable frffiula wherein X stands for hydrogen or NH .GH .CH OH with the addition of a stabilizing agent.

2. An aqueous solution of a hydroxyethyli5 amino salt of 3acetylamino--hydroxyben- Serial No. 514,064.

zene arsoni'c acid of the following probable formula NHOOOH:

ox O= s \ONHLCHLOHIOH wherein X stands for hydrogen or -NH .CH .CH OH With the addition of a small quantity of sodium sulfite.

3. An aqueous solution of a hydroxyethylamino salt of 3-acetylamino-4-hydroxyben zene arsonic acid of the following probable formula NH O O OH;

with the addition of a small amount of sodium sulfite.

In testimony whereof, we affix our signatures.

KARL STREITWOLF. ALFRED FEHRLE. WALTER HERRMANN. PAUL FRITZSCHE. 

